From nobody Sat Jun 27 16:16:18 2026 Received: from cstnet.cn (smtp21.cstnet.cn [159.226.251.21]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C2DED331A7E; Mon, 8 Jun 2026 15:18:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.21 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780931885; cv=none; b=K830kltDBGL/9k1bxNoTWLBg2LfHCcT6X0Qnd7CjBtiuevlsHlG0XHxfh0VT4qXOrGgLlyQs5qBXzpLL/gt8DMrjnUfZcxN6rGEOVsVd2N6+LdDNC7yhRGi2P/4Wpjl5wEitFBk5c05aNBR5cMWzPP2+2ZLSY97ehYvlllT1ej0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780931885; c=relaxed/simple; bh=K9p27pNdwqddgm00diVh8tCYJvpYfRuwYufY8MF0TRs=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=eEmzaLpYxQu8ipw4PElShk2tmFNsnI9eyOHOqcX//Uyuih+k6iwSdXxrsO4kY+htw36slcdguBc4NWTQnJ2WUDMdJLL2k18lkWzbr/7SUYb5lggPmAArVW2nQ2e+RfxLzRSTbY+o4UvertTdw9poYxtVw1Q3ErVaTpXCzEYgTzo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.21 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from dfae2b116770.home.arpa (unknown [36.110.52.2]) by APP-01 (Coremail) with SMTP id qwCowAD3mtMn3SZqqUDnAA--.3777S2; Mon, 08 Jun 2026 23:17:59 +0800 (CST) From: Wentao Liang To: jgg@ziepe.ca, leon@kernel.org Cc: fw@strlen.de, kees@kernel.org, linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, Wentao Liang , stable@vger.kernel.org Subject: [PATCH] RDMA/iwpm: fix kref bypass in iwpm_add_mapping() error path Date: Mon, 8 Jun 2026 15:17:51 +0000 Message-Id: <20260608151751.151532-1-vulab@iscas.ac.cn> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qwCowAD3mtMn3SZqqUDnAA--.3777S2 X-Coremail-Antispam: 1UD129KBjvJXoWrtF4DCr1ftr47uFWkAFy8Grg_yoW8Jr4rpr W5Aa12kr15Wa1Sya18WF90vF1xX397Xa9rGa4UKw17ArnxXws2y3Z8Ca4UXFs7Ar1kKrsx WrsrCF4qgFy2qF7anT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUkC14x267AKxVW8JVW5JwAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2ocxC64kIII0Yj41l84x0c7CEw4AK67xGY2AK02 1l84ACjcxK6xIIjxv20xvE14v26r1I6r4UM28EF7xvwVC0I7IYx2IY6xkF7I0E14v26r4j 6F4UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s 0DM2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xII jxv20xvE14v26r1Y6r17McIj6I8E87Iv67AKxVW8Jr0_Cr1UMcvjeVCFs4IE7xkEbVWUJV W8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lc7CjxVAaw2AFwI0_ JF0_Jw1l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67 AKxVWUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r1q6r43MIIY rxkI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14 v26r1j6r4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8 JwCI42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjfUowIDDU UUU X-CM-SenderInfo: pyxotu46lvutnvoduhdfq/1tbiBwsMA2om2m4IIAAAsT Content-Type: text/plain; charset="utf-8" iwpm_get_nlmsg_request() returns with kref_init() + kref_get() (refcount=3D2). iwpm_add_mapping() calls iwpm_free_nlmsg_request() directly on the error path instead of using kref_put(), bypassing the kref mechanism and freeing the object with a non-zero refcount. Replace the direct iwpm_free_nlmsg_request() call with kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request). Cc: stable@vger.kernel.org Fixes: 30dc5e63d6a5 ("RDMA/core: Add support for iWARP Port Mapper user spa= ce service") Signed-off-by: Wentao Liang --- drivers/infiniband/core/iwpm_msg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/infiniband/core/iwpm_msg.c b/drivers/infiniband/core/i= wpm_msg.c index 672b0c33a6de..854c974d6586 100644 --- a/drivers/infiniband/core/iwpm_msg.c +++ b/drivers/infiniband/core/iwpm_msg.c @@ -207,7 +207,7 @@ int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl= _client) add_mapping_error_nowarn: dev_kfree_skb(skb); if (nlmsg_request) - iwpm_free_nlmsg_request(&nlmsg_request->kref); + kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request); return ret; } =20 --=20 2.34.1